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7/31/2019 E 12 Test Switches
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Test Switches
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Principles of system protection technology
Test Switches
Trainer: Hermann Paetzold
PTD PA16
Phone: +49-911/433-8321
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Commissioning test
Functional check (every two years, without tools)
-Comparing measured values (current, voltage)
- Trip test- Reading the event buffer- Verifying the protective fault message
Protection test ( about every five years )- Testing a measuring point (current, voltage)- Testing all used BIs and BOs- Interface testing
Testing Protective Relays
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Enables easy, reliable, and quick test with currents andvoltages to verify correct A/D and calculation.
Interrupts the TRIP and CLOSE commands to the circuit
breaker
Visual- and electrical indication of test position
Pre-assembled connection to the portable test set
Design and connection matches all digital protection devices
Protection Test via Test Switch
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The right test switch for application to every protection device
Feeder protection with starpoint inside the test switch
Feeder protection with open star point in the test switch
Test switch for transformer differential protection
Test switch design with additional contacts and functions
Test Switch Versions
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Prfung der EingangsmegrenTesting the Measured Input Values
Test switch
1
2
3
Betrieb
Test
Prfschalter
X2Schutzrelais
X2
4
- S1
L1
L2
L3 Operation
Protect. relay
Test switch
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Prfschalter mit aufgelstem Sternpunkt im Strommekreis (Betrieb)
Test Switch with Open Starpoint in the Current MeasuringCircuit (Operation)
1
2
3
Betrieb
Test
Prfschalter
X2 Schutzrelais
4
- S2
L1
L2
L3
L1
L2
L3
N
Zu weiteren
Schutzgerten
Test switch
Operation
Protect. relay
To other protect. relays
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Prfschalter mit aufgelstem Sternpunkt im Strommekreis (Test)
1
2
3
Betrieb
Test
Prfschalter
X2Schutzrelais
4
- S2
L1
L2
L3
L1
L2
L3
N
Zu weiterenSchutzgerten
Protect. relay
Test switch
Operation
To other prot. relays
Test Switch with Open Starpoint in the Current MeasuringCircuit (Test)
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Unterbrechung AUS / EIN bei Prfung mit PrfschalterInterruption of TRIP / CLOSE During Test via Test Switch
Protective relayTrip Trip Trip
Operation
Circuit breakertrip
CB CloseTestindication
indication
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The TIRP command contact remains closed - the CB closingcircuit remains open until reset
It is used to:
- output the TRIP command continuously- disable the CLOSE command
Only upon acknowledgement is the latched command reset.
Latching takes place:- in the SW of the protection device ( SIPROTEC 4)- via separated lock-out relays which are mechanically linked.
Reset: electrically or hand reset
Lock-Out Function
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Lock Out RelaisLOCK-OUT RELAY
Kontakte dargestellt
bei Stellung Reset
L+
LS
EIN
Schutz
AUS
Reset
R S
L-
LS
AUS
1 L+
Reset
LS
EIN
LockOutRelais
Close
CloseTrip
ProtectionTrip
Lock-outrelay
Close
Contacts shown atreset position
CB
CB CB
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The trip circuit is monitored as to:- Presence of the control voltage- Interruption in the wiring- Interruption in the trip coil of the CB
Supervision takes place:- in the protection device via BI ( advantage of self-monitoringand oscillographic record with time stamp)
- with separated special monitoring relays
The trip-circuit supervision is possible for phase-selectivetripping and / or three-phase tripping
Trip-circuit Supervision
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Auslsekreisberwachung im Schutzgert mit zwei Binreingngen
~2 mA
Trip-circuit Supervision in the Protection Device with Two Binary Inputs
AUS
Schutz
StU
L+
BE1
BE2
HIKO1 HIKO2
LSS
L-
LS
EIN
Meldung
SIPROTEC
AUSSchutz
StU
L+
BE1
BE2
HIKO1 HIKO2
LSS
L-
LS
AUS
Meldung
SIPROTEC
BI1 BI1
BI2 BI2
CB CB
TripClose
Aux.
Cont.1Aux.
Cont.1
Aux.
Cont.2Aux.
Cont.2
indication indication
TRIP
protectionTRIPprotection
CBTCCBTC
VCTRL
VCTRL
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Trip-circuit Supervision in the Protection Device with One Binary Inp
~2 mA
AUS
Schutz
StUL+
BE1
HIKO1 HIKO2
LSS
L-
LS
EIN
Meldung
SIPROTEC
R
EIN AUS
AUS
Schutz
StU
L+
BE1
HIKO1 HIKO2
LSS
L-
LS
AUS
Meldung
SIPROTEC
REIN AUS
VCTRLVCTRL
BI1 BI1protection protectionTRIP TRIP
indication indication
Trip Trip
Trip
CB CB
Close
CBTC CBTC
Close Close
Aux.
Cont.1
Aux.
Cont.1
Aux.
Cont.2
Aux.
Cont.2
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AuslsekreisberwachungTrip-circuit Supervision
AUSSchutz
L+
HiKo1
L-
LS
EIN
Meldung
HiKo2Aux.Cont.1
Aux.Cont.2
indication
TRIP
protection
CB
Close
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